Apparatus for spinning rayon



June 24,1941. w. WUPPERMANN 2,246,990

' APPARATUS FOR SPINNING RAYON Filed Nov. 9. 1937 6 Sheets-Sheet 2 I.717 venior:

June 24, 1941. w. WUPPERMANN 2,246,990 I APPARATUS FOR SPINNING RAYONFiled Nov. 9, 1937 e Sheets-Sheet 3 June 24,1941. w. WUPPERMANN2,246,990

APPARATUS FOR SPINNING RAYON .Filed Nov. 9, 1937' s Sheets-Sheet 4'i/iaraav.

June 24, 1941. w. WUPPERMANN APPARATUS FOR SPINNING RAYON 7 Filed Nov.9, 1937. I a Shets-Sheet '5 7n. 2:: n for:

J ne 24, 194 w. WUPPERMANN 90 APPARATUS FOR SPINNING anon Filed Nov. 9,1937 s Sheets-Sheet 6 Javsnfor:

Mfln E .19 W2 Patented June 24, 1941 UNITED STATES PATENT OFFICE Myinvention relates to improveme APPARATUS FOR SPINNING BAYON WilhelmWuppermann, Berlin-Zehlendorf,

Germany Application'November 9, 1937. Serial No.-1'l3,691-

In Germany May 15, 1937 12 Claims. (01. 18-8) paratus for spinningrayon, and more particuline 8-4 of Fig. 7,

larly in apparatus of the type comprising a rotary tubular containeradapted to have the coaguthe line 9-9 of Fi la-ting bath circulatedtherethrough, and anozzle Fig. is a fragmentary sectional elevation forthespinning liquid such as viscose fixed withshowing anothermodification of the spinning apin said container and rotatabletherewith, the paratus,

spinning liquid or viscose delivered from the nozzle in the form offilaments being coagulated line ll-ll of Fig. 10,

within the said container and twisted when it 10 Fig. 12 is afragmentary sectional plan view leaves the said container. One of theobjects of the improvements is to provide an apparatus of this typewhich is simple in construction and relianother modification,

able in operation, and with this object in view my. invention consistsin constructing the said S g o h modification, tubular container in theform of a centrifugal pump adapted to draw the coagulating liquidthrough the said container, the said container nozzle. and

being immersed with its open bottom and into a I suitable coagulatingliquid. Another object of n the example shown in Fig. 1 the spi niapparatus comprises a vertically mounted rotary pipe I carrying aspinning nozzle 2 at its top and passed through the bottom of areceptacle 3 containing a suitable coagulating bath, the said pipecontainer, and with this object in view my inbeing a pted to e r p yrotated- T0 t P vention consists in constructing the container at itstop end so that the said gas or air is delivered together with thecoagulating liquid 1 For the purpose of explaining the invention severalexamples embodying the same have been clined delivery Openings 011 the P4 a cup shown in. the accompanying drawings in which the same referencecharacters have been used in all the views to indicate correspondingparts.

In said drawings:

the improvements is to provide an apparatus in which air or gas whichmay get into or developed within the coagulating liquid flowing throughthe said container is removed at the top end of the ning apparatus inwhich the nozzle is located at the bottom of the rotary container, andthe spinning liquid or viscose passes through the said container inupward direction,

a modification in which the nozzle is located near the top part of thecontainer, the spinning liquid or viscose and the filament being formedmoving through the said container in downward direction,

Fig. 3 is a sectional plan view taken .on the line 3-4 oi. Fig. 2,

Fig. 4 is a sectional elevation viewed from the t right in Fig. 2,

Figs. 5 and 6 are similar elevations showing positions,

Fig. 7 is a fragmentary sectional elevation showing a modification.

nts-inap- Fig. 8 is a sectional plan view taken on the Fig. 9 is adetail sectional elevation taken on Fig. 11 is a sectional plan viewtakenon the taken on the line l2l2 of Fig. 10.

v Fig. 13 is a detail sectional elevation showing Fig. 14 is afragmentary sectional elevation Figs. 15, '16 and 17 are detailsectional elevations showing other modifications of the spinning Figs.18 and 19 show another modification,

I. a pipe 4 of larger diameter is fixed which is immersed with its openbottom end into the "coagulating bath contained within the receptacle 3,and which is formed at its top end with in- B is removably mounted, andto the said cup a tubular container I is fixed. The cup 6 encloses thenozzle. 2. At its top end the container 1 flares outwardly at 8, and itis closed by a conical F 1 is a muonal elevation showing. a spin- 35 lid9 formed at its center with a delivery opening for the thread l0 beingformed. Around the outer upper margin of the flaring part 8 of thecontainer there are delivery openings. II for the 4 coagulating bath,The diameter of the central opening made in the lid 9 is not larger thanis Fig. 2 is a similar sectional elevation showing necessary for passingthe filament m and a part of the coagulating bath therethrough. Itwillbe seen that the pipe I, the cup 6, the container 1, and the lid 8together constitute a rotary container, arranged in vertical position,whose otherwise continuous walls have a lowerintake adjacent the axis ofrotation, and an upper delivery more remote from the axis of rotationthan the The apparatus is operated as follows:

When the apparatus is arranged and is in the t parts of the spinningapparatus in different condition shown in Fig. 1, the lower end of thepipe 4 extending beneath the surface of a bath 3 of coagulating liquid,and'with the understanding that the entire container, including theparts 4, 5, fl, 8, and 9, is filled with liquid, ,the rapid rotation ofthis container will cause coagulating liquid to be drawn upwardly fromthe receptacle 3 and. to be ejected. through the openings I I. Therotating container thus acts as a centrifugal pump. Within the pipe 4rotary movement is imparted to the coagulating liquid, so that the Anyair or gas which might be developed within the container 1 is carriedupwardly with the coagulating liquid and delivered therewith through theopenings II, such gas delivery being assisted by the conical shape ofthe lid 9.

In Fig. 2 I have shown a modification in which the nozzle I3 is locatednear the top end of the rotary container I6 for the coagulating bath.

As shown, the spinning apparatus comprises a pipe I4 for the supply ofthe spinning liquid or viscose, a spinning head I5 carrying the nozzleI3 and fixed to the pipe M, a container I6 in the form of afunnelimmersed with its bottom end into a suitable coagulating bath, athree-phase motor IT for imparting rotary movement to the spinning head,and a frame I8, I9 carrying the spinning apparatus and mounted for beingvertically shifted between rails and 2|. The frame I8, I9 is suspendedby means of a rope or chain 24. Thus the spinning apparatus is adaptedto be moved upwardly and downwardly between the rails 20, 2| for more orless'immersing the container I6 to desired depth in the coagulatingbath. The head I5 is provided peripherally with bores 26 that in theassembly constitute the delivery of the centrifugal pump whose barrel isthe container I6 operating in like manner as the container of Fig. 1already described.

In the normal operation of the apparatus the I6. In the example shown inthe figures the said ejectors are located within the same. plane aspassages 25 that act as a centrifugal pump. But the construction mayalso be such that the electors are located within a plane different fromthat of the passages 26. The ejectors are operated by the coagulatingbath which is delivered through the nozzles 33, 34 by centrifugalaction.

For starting the spinning operation the apparatus is lowered so far thatthe head I5, is immersed with the passages 25 in the coagulating liquidcontained within the receptacle 3|, so that the container IS, the headI5 and also the receptacle 29 are nearly filled with coagulating bath(in Fig. 2 the level of the surface of the bath when the apparatus hasbeen so lowered is indicated by the dotted line c, c). For the normalspinning operation the nozzle and the container I6 must be rotated from5000 to 8000 revolutions per minute. But for starting spinning (theapparatus being in the lowered and submerged position described) thisvelocity is toohigh, and therefore means must be provided for rotatingthe spinning apparatus at comparatively low velocity when the operationis started. For this purpose at the beginning of the spinning operationthreephase current of lower frequency and lower voltage may be impartedto the motor II, so that its number of revolutions is only a fewhundreds per minute, the said number of revolutions being only so largethat as the apparatus is raised and the passages 25 emerge from the baththe apparatus will act as a centrifugal pump for drawing the coagulatingliquid through the container I5. After the flow of the coagulatingliquid has thus been started the spinning apparatus is continuouslymoved upwardly until only the bottom end of the container I6 is immersedinto the coagulating bath. Now the level of the coagulating bath is suchas has been indicated by the full line b--b. Meanwhile three-phasecurrent of the normal frequency is supplied to the motor I1, so

that the number of revolutions of the device rises container I6 isimmersed into the coagulating bath with its bottom end only, and thecoagulating bath is drawn upwardly by means of bores 26 provided at thetop end of the container and acting as a. centrifugal pump. A jacket 2!disposed around the container IG and immersed into the coagulating bathis'provided with ribs 28 preventing the transmission of the rotarymovement of the container IE to the coagulating bath. These ribs 28 arein the ensuing claims characterized braking members.

The coagulating liquid ejected from the centrifugal pump 26 iscollected'within a receptacle 29 from which it is delivered through agutter 30 to a receptacle in which it is regenerated before it isreturned to the receptacle 3| containing the coagulating bath.

In the operation of the apparatus air may get into the cointainer, orgas may be developed by the action of the coagulating liquid on theviscose, and means are provided for removing such air and gas from thetop part of the container. These means are shown in detail in Figs. '7,8 and 9. Below the top end of the container I6 oneor more ejectors 32are fitted in the wall of the said container, the said electorsconsisting of nozzles as'far as is necessary for a normalspinningoperation.

In a modification the number of revolutions of the motor is reduced byproviding the stator with two windings for different numbers ofrevolution.

The thread guide consists of two pins 38 and 39 on which the filamentdelivered from the container I6 is guided before it is wound on a roller40 transmitting the same to a collecting device;

The said pins are mounted on an angular rod 4| the top part of which isdisposed at an obtuse angle to the main part thereof. The said rod isguided in a vertical guide way provided on the frame I8, I9, and thesaid guide way is engaged either by the upper straight portion 4I0 ofthe rod, or by the lower straight portion, angularly disposed withrespect to the portion 0, and to which the numeral ll is immediatelyapplied, the said rod being setin its positions from its top end andfrom above the coagulating bath.

The spinning operation -is started as follows: I From the spinningapparatus the funnel shaped container I6 is removed, and the apparatusis lowered by means of the rope 24 so far that the nozzle is justimmersed into the coagulating bath. The spinning liquid or viscose issupplied to the nozzle, and the filament being formed is drawn throughthe funnel shaped container I6 by means of a wire or hook and thereafterthe said container is fixed to the head I5 by means of a nut 42. Thefilament is now placed on the roller 40,

passages 69 and ejector nozzles 66, 6|. fore by centrifugal action thecoagulating liquid and-the spinning apparatus is further lowered untilthe spinning head and particularly the passages 26 forming thecentrifugal pump are completely immersed, and the air is expelled fromthe container 16 (Fig.6). The rod 6| now is in the position A, shown inFig. 6 in dashes and dots, in which position the pins of the threadguide are located slightly below the surface a-a of the spinning bath.The bottom part of the rod is temporarily retained in such positionwithin the guide way by means of a screw nut (not shown). The said rodis then lowered until its upper angularly disposed portion 6" engages athe apparatus is raised until the bores 26 emerge from the surface ofthe bath, so that the centrifugal pump begins to draw the coagulatingliquid upwardly and through the container l6. The spinning apparatus isthen lifted so far that only the bottom end of the container is immersedinto the coagulating bath, as is shown in Fig. 2, and the level of thebath relatively to the container is at b-b. Finally the length of thecourse of the filament within the coagulating bath 6i may be increased'by moving the rod 64 from the Meanposition C'into the position D (Fig.while the speed-of rotation has been increased to the high velocityneeded for twisting. The coagulating liquid is ejected. from thespinning head l5 through the holes 26 and into the receptacle 29 (Fig.2), and it is removed from the said receptacle through the gutter 36.The object of the Jacket 21 is to confine the vapor of coagulating bathproduced by the rotary movement of Next, the rod 6| is turned counterisdrawn through the container 62. Air or gas bubbles which might risewithin the container cannot be collected on the nozzle by reason of, thetapering shape of the said annular nozzle. and they rise eitheroutwardly along the outer tapering wall of the cap screw 66, or, alongthe inner wall of the nozzle. formed by the conical bottom end of anaxial bore 66 of the screw 66.

Through the said bore the air or gas gets through a chamber 66 andinclined and outwardly directed passages 65 and 66 to the top part 61 ofthe cup 6|, from whence they are'drawn oil by the electors 60, 6|.

The sectional view of Fig. 11 shows the vertical bores 66 and theinclined passages 66 and 66.

The sectional view shown in Fig. 12 shows-pas? sages 59 in addition tothe ejectors 66, 6| the coagulating liquid being delivered through thesaid passages by centrifugal action. These passages may be dispensedwith in which case the coagulating liquid is delivered exclusivelythrough the electors. I

The velocity of the flow of the coagulating liquid in the bores 63, 65and 66 and the annular top part of the container 52 above the nozzle isdetermined by the dimensions of the cross-sections respectively of theaxial bore 63 and the passage between the head 66 and the adiacent wallof the container 52. Thereby the fiow within the axial bore 63 is madesuch that the air bubbles are safely removed without interfering withthe formation of the filament from the viscose delivered through thebores of the nozzle;

In the modification shown in Fig. 13 the bores of the nozzle areinclined inwardly and downwardly, in accordance with the tendencyof thefilaments, the specific gravity of which is smaller than that ofthecoagulating bath, to direct themselves inwardly by centrifugalaction.

Any gas or air which may rise within the container I6 is removed by theejectors 66, 66.

By means of the construction shown in Fig. 7 air and gas are effectivelyremoved from the container l6 by ejector action. Therefore the bores 26forming the centrifugal pump are always completely filled with.coagulating liquid, and

. therefore their eiilciency is not impaired by air carried along by thecoagulating liquid.

In Figs. 10 to 1'! I have shown further modifications in which the airand gas are removed in a reliable way. In these modifications bevelledguide faces for the said" gas and air or bubbles of gas or airareprovided.

In the construction shown in Fig. 10 the spinand 56 being provided foraffording a tight joint.

Near its top part the cup 6| is provided with In the modification shownin Fig. 14 the nozzle 16 is mounted on a head 69. The nozzle is formedwith a downwardly directed conicalextension II in which the bores of thenozzle are made. The air 'or gas bubbles which rise within the containercollect near the axis of the device, because their specific gravity issmaller than that of the coagulating bath. But they cannot stick to theconicalnozzle 'II and they flow upwardly along the said conical nozzleand the conical outer wall of the nut 66. .They are collectedat the toppart of the cup 6| at 61 and are removed by electors 66, 6|.

In Fig. .14 the level of the coagulating liquid ofthe bath is shown tostand higher than. the discharge orifices 66, 6I. From what has gonebefore it will be understood that this position of the apparatus in thebath is the initial position, when operation is beginning.

. In the modification shown in Fig. 15 a nomle of normal construction isused which has a conical body I2 axially secured thereto, for example bymeans'of a screw, the said conical body being made for example fromartificifl, resin.

In Fig. 16 anannuiar nozzle 16 is provided which has a conical body"fixed thereto by means of a cylindrical stud I5 fitted in the centralpart of the nozzle.

In themodiflcation shown in Fig. 17 a conical I body I1 is fittedaxially within an annular nozzle I6, and thesaid nozzle is formed withan axial bore I6 communicating at its top end with the container for thecoagulating liquid through inclined passages 66.

There- By means of the conical bodies fixed to the bottom parts of thenozzles thefilaments are separated from each other so that they do notstick to one another.

Figs. 18 and 19 show a modification of the manner of suspending thespinning apparatus. The spinning apparatus is mounted on a framecomposed of a pair of rails 92 having pins 8| fixed thereto, by means ofwhich they are guided in slots 82 made in brackets 83. The rails aresuspended by means of a rope 84 from a pulley 85, so that the wholeapparatus may be lowered and lifted, as has been described above. Thethread guides 86 are fixed to the rails 92.

For starting the spinning operation, the whole apparatus isimmersed-with the tubular container 81 into the coagulating bath 88, andspinning is started with low velocity of the container 81 and the nozzlemounted therein. For pulling the filament being formed from thecontainer 81, the whole apparatus is turned into the position shown inFig. 18 in dotted lines, so that the bottom end of the container 81 isnear the surface of the bath. Thus the filament can be readily pulledfrom the container and passed over rollers 89 and 90 on a bobbin 9|. Nowthe apparatus is returned into vertical position and lifted so far thatonly the bottom end of the con- I tainer 81 is immersed into the bath.

I claim:

1. An apparatus for spinning rayon, compressing a vertically mountedrotary pipe, a spinning nozzle borne by said pipe and rotatabletherewith,-means for drawing filament asjii; is developed from saidnozzle and in the line of the axis of rotation, and means formaintaining the spinning nozzle and the newly developed filamentimmersed in a correspondingly rotating bath of coagulating liquid, suchmeans consisting of a receptacle for coagulating liquid and a tubularcontainer arranged coaxially with said pipe and integrated with the pipeand rotating therewith, said container rising from beneath the surfaceof a body of liquid within said receptacle and enveloping the filamentdeveloped from the said spinning nozzle, and forming an annular chambersurrounding the nozzle, the said container at its lower end and beneaththe surface of the liquid in the receptacle being open, and at its upperend being provided with a delivery orifice spaced from the vertical axisof the container at a distance greater than the radius of the open lowerend of the container, the container being substantially closed at itsupper end.

2. An' apparatus for spinning rayon comprising a vertically mountedrotary pipe, a spinning nozzle borne by said pipe and rotatabletherewith, means for drawing filament as it is developed from saidnozzle and in the'line of the axis of the surface of a body of liquidwithin said receptacle and enveloping the filament developed from thesaid spinning nozzle, and forming around the nozzle an' annular chamber,the said container at its lower end and beneath the sur-.

face of the liquid inrthe receptacle being open, and at its upper endbeing provided with a delivery orifice spaced from the vertical axis ofthe container at a distance greater than the radius of the open end ofthe container, and. a downwardly tapering conicailid formed at itscenter with a delivery opening, substantially closing the said containerabove.

3. An apparatus for spinning rayon comprising a vertically mountedrotary pipe, a spinning nozzle borne by said pipe and rotatabletherewith, means for drawing filament as it is developed from saidnozzle and in the line of the axis of rotation, and means formaintaining the nozzle and the newly developed filament immersed in acorrespondingly rotating bath of.

coagulating liquid, such means consisting of a. receptacle forcoagulating liquid and a tubular container arranged coaxially with saidpipe and integrally united with the said pipe and rotating therewith,the said container rising from beneath the surface of a body of liquidwithin said receptacle and enveloping the filament developed from thesaid spinning nozzle, and forming an annular chamber around .the nozzle,the said container at its lower end and beneath the surface of theliquid in the receptacle being open, and at its'upper end being providedwith a delivery orifice spaced from the vertical axis of the containerat a distance greater than the radius of the open lower end of thecontainer,

the container being substantially closed at its upper end, and a gasejector arranged in said opening.

4. An apparatus for spinning rayon comprising a vertically mountedrotary pipe, a. spinning nozzle borne by said pipe and rotatabletherewith, means for drawing filament as it is developed from saidnozzle and in the line of the axis of rotation, and means formaintaining the nozzle and the newly developed filament immersed in acorrespondingly rotating bath of coagulating liquid, such meansconsisting of a receptacle for coagulating liquid and a tubularcontainer arranged coaxially with said. pipe integrated with the pipeand rotating therewith, said container rising from beneath the surfaceof a body of liquid within said receptacle and enveloping the filamentdeveloped from the said spinning nozzle, and forming an annular chamberaround the nozzle, the said container at its lower end and beneath thesurface of the liquid in the receptacle being open, and at its upper endbeing provided with a delivery orifice spaced from the vertical axis ofthe container at a distance greater than the radius of the open lowerend of the container, the container being substantially closed at itsupper end, a gas ejector arranged in said opening and a gas passagewayformed in the wall of the container and leading from the chamber withinthe container and from the highest portion thereof to the said gasejector.

5. An apparatus-for spinning rayon comprising a vertically mountedrotary pipe adapted to receive spinning liquid from above, a spinningnozzle provided with bores borne by said pipe at its lower end androtatable therewith, the nether surface of the nozzle adjacent theopening of such bores being oblique in extent, means for drawingfilament as it is developed from said nozzle downward and in the line ofthe axis of rotation, and means for maintaining the "nozzle and thenewly developed filament immersed in a correspondingly rotating bath ofcoagulating liquid, such means consisting of a receptacle forcoagulating liquid and a tubular container arranged coaxially with saidpipe integrated with the pipe and rotating therewith, the said containerrising from beneath the sunface of a body of liquid within saidreceptacle and enveloping the filament developed from the said spinningnozzle and forming an annular chamber around the nozzle, the saidcontainer at its lower end and beneath the surface of the liquid in thereceptacle being open, and at its upperend and at a level higher thanthe opening of the bores in the spinning nozzle being penetrated with adelivery orifice, such ,a delivery orifice being spaced from thevertical axis of the container at a distance greater than the radius ofthe open lower end of the container, the container being substantially,closed at its upper end.

, 6. An apparatus for spinning rayon comprising a vertically mountedrotary pipe adapted to receive spinning liquid from above, a spinninghead borne by the said pipe at its lower end and gotatable therewith,the head being provided with downwardly directed bores grouped inannular formation, and the head being further provided with'an axialpassageway that opens from below with conical walls converging upwardlyand that "leads upward and delivers laterally through. the

body of the said spinning nozzle, means for drawing filament as it isdeveloped from said head'downward and in the line of the axis ofrotation, and means for maintaining the spin-- ning head and the newlydeveloped filament immersed in a correspondingly rotating bath ofcoagulating liquid, such means consisting of a receptacle forcoagulating liquid, and a rotary container arranged coaxially with saidpipe united to and rotating in unison with the pipe,

the said container rising from beneath the surface of a body of liquidwithin said receptacle and enveloping the filament developed from thesaid spinning. nozzle, and forming around the head an annular chamber,the said container at its lower end and beneath the surface of theliquid in the said receptacle being open, and at its upper end and at alevel higher than the opening of the bores in the head being penetratedwith a delivery orifice, such delivery orifice being spaced from thevertical axis of the container at a distance greater than the radius ofthe open lower end of the container, the container being substantiallyclosed at its upper end.

' vided with downwardlydirected bores, and the nozzle being tapered inits central portion downwardly, means for drawing filament as it is de-',veloped from said nozzle downwardly and in the line of the axis ofrotation, and means for maintaining the nozzle and the newly developedfilament immersed in a correspondingly rotating bath of coagulatingliquid, such means consisting of a receptacle for coagulating liquid anda tubular contained arranged coaxially with said pipe united to the saidpipe and rotating therewith, the said container rising from beneath thesurface of a body of liquid within the said receptmle and enveloping thefilament developed from th said spinning nozzle, and forming an annularchamber around .the-nozzle, the said container at its lower end andbeneath the surface of the liquid in the receptacle being open, and atits upper end and at a level higher than the opening tainer at adistance greater than the radius of the open lower end of the container,the container being substantially closed at its upper end.

8. An apparatus for spinning rayon comprising a vertically mountedrotary pipe adapted to receive spinning liquid from above, a spinning,nozzle borne by the said pipe at its'lower end and rotatable therewith,the nozzle being provided with downwardly directed bores grouped inannular formation, and a downwardly tapered block fixed to the nozzlewithin the annulus of res, means for drawing filament as it is developedfrom said nozzle downwardly and in the line of the axis of rotation, andmeans for maintaining the nozzle and the newly developed filamentimmersed in a correspondingly rotating bath of coagulating liquid, suchmeans consisting of a receptacle for coagulating liquid and a. tubularcontainer arranged 'coaxially with said pipe and united integrally withthe pipe and rotating} therewith, the said container rising from beneaththe surface of a body of liquid within the said receptacle andenveloping the filament developed from the said spinning nozzle, andforming around the nozzle an annular chamber, the said container at itslower end and beneath the surface of the liquid in the receptacle beingopen, and at its upper end and at a level higher than the openings ofthe bores in the spinning nozzle being penetrated with adeliveryorifice, such delivery orifice being spaced from the verticalaxis of the container at 9, distance greater than the radius of the openlower end of the container, the container being substantially closed atits upper end.

9. An apparatus for spinning rayon comprising a vertically mountedrotary pipe adapted to receive spinning liquid from above, a spinmnghead borne by the said pipe at its lower end and rotatable therewith,the head being provided with downwardly directed bores grouped inannular formation, and 'a block fixed centrally in the head,- said blockbeing formed with a tapering lower end, projecting downwardly from thehead within the circle of its bores-and having itself of the bores inthe spinning nozzle being pene- 7 an axial bore, a passageway formed inthe body of the head outwardly, through which the bore in the said blockhas communication, means for drawing filament as it is developed fromsaid head downwardly and in the line of the axis of rotation, and meansfor maintaining the nozzle and the newly developed filamentimmersed in acorrespondingly rotating bath of coagulating liquid, such meansconsisting of a receptacle for nular chamber; the said container at itslower.

end and beneath the surface of the liquid within the receptacle beingopen, and at its upper end and at a level higher than the opening of thebores in the spinning head being penetrated with a delivery orifice,such delivery,- orifice being spaced from the vertical axisof thecontainer at a distance greater than the radius of the open lower end ofthe container, the container being substantially closed at its upperend.

10. An apparatus for spinning rayon comprising a vertically mountedrotary pipe, adapted to receive spinning liquid from above, a spinningnozzle borne by said pipe at its lower end and rotatable therewith,means for drawing filament as it is developed from said nozzle downwardand in the line of the axis of rotation, means for maintaining thespinning nozzle and the newly developed filament immersed in acorrespondingly' rotating bath of coagulating liquid, such meansconsisting of a receptacle for coagulating liquid and a tubularcontainer arranged coaxially with said pipe and united with the saidpipe and rotatable therewith, said container adapted to occupy aposition in which it rises from beneath the surface of a body of liquidwithin the receptacle, enveloping the filament developed from the saidspinning nozzle and forming an annular chamber around the spinningnozzle, the said container at its lower end and beneath the surface 01'the liquid in the receptacle being open, and at its upper end beingprovided with a delivery orifice spaced from the vertical axis of thecontainer at a distance greater than the radius of the open lower end ofthe container, the container being substantially closed at its upperend, means for raising and lowering the container relatively to thelevel of the liquid in the receptacle, and a thread guide movable withthe container as it is raised and lowered.

11. In combination with a receptacle for coagulating liquid, apparatusfor spinning rayon conconsisting of a tubular container arrangedcoaxially with said pipe, united with the pipe, and rotatable therewith,said container adapted to occupy a position in which it rises frombeneath the surface of a body of liquid within said receptacle,enveloping the nozzle and forming an annular chamber around the nozzle,the said container at its lower end andbeneath the surface of the'liquldin the receptacle being open, and at its upper end being provided with adelivery orifice -spaced from the vertical axis of the container at adistance greater than the radius of the open lower end of the container,the container being substantially closed at its upper end, a threadguide carried on a rod including two portions angularly disposedrelatively to each other, and a guide-way borne by the spinningapparatus with which the said rod in either of its por- .tions may beengaged.

12. An apparatus for spinning rayon, comprising a vertically mountedrotary pipe, a spinning nozzle borne by said pipe and rotatabletherewith, means for drawing filament as it is developed from saidnozzle and in the line of the axis of rotation, means for maintainingthe spinning nozzle and the newly developed filament immersed in acorrespondingly rotating bath of coagulating liquid, such meansconsisting of a receptacle for the coagulating liquid and a tubularcontainer arranged co-axially with said pipe and integrated with thepipe and rotating therewith, said container rising from beneath thesurface oi! a body of liquid within said receptacle and enveloping thesaid spinning nozzle and filament developed therefrom, and forming anannular chamber surrounding the nozzle, the said container at its lowerend and beneath the surface of the liquid in the receptacle being openand at its upper end being provided with a delivery orifice spaced fromthe vertical axis of the container ata distance greater than the radiusof the open lower end of the container,'the container beingsubstantially closed at its upper end, and a jacket surrounding thevcontainer and immersed in the coagulating bath, the jacket beingprovided with ribs that constitute braking members adapted to checkinduced rotation of the liquid in the receptacle.

WILHELM W'UPPERMANN.

